Share 'Where you once a Christian? What changed your mind?'

I have been wondering this for some time.
How many Atheists around here were once Christian? Are there more Atheists that were once Christians then there are life long Atheists / Agnostics?
If you were once Christian, what changed your mind? How long were you a Christian before becoming an Atheist?
If you were a Christian, do you know of any Atheists that converted to Christianity?
I have nev…